Research On Rock Burst Prevention And Control About Close Distance Coal Seams Mining In The No.2JiNing Coalmine

With the depth of coal mining increase, the probability of rock burst disaster are in an increasing. When the rock burst happen, it will not only influence the tasks of coal mine production, but also damage the mining equipments and injure the workers. So it is necessary for us to be more thorough and systematic research on the protective mechanism of the rock burst.Through the scene investigates and studies, testing, numerical simulation and theoretical analysis method, this paper research the safe distance of close-seams mining synchronization and systemically assess the rock burst hazard of93down07work face pass the3up coal pillar area, and the corresponding prevention measures technical research of the No.2JiNing coalmine. Firstly, by the methods of the scene investigates and studies, identified the3up and3down coal seams with strong rock burst liability, and their roofs with weak burst liability, then through the theoretical analysis to determine the scope of rock burst danger areas. Secondly, with the numerical simulation method, analyse the stress distribution influenced of working face and roadways during93down07working face pass the3up coal pillar, further define the rock burst danger areas of93down07working face. Then, this paper use pressure observation method, secondary stress observation method, and refer the microseismic observation data of nearby mine to analysis the synchronous mining. Finally, through the above analysis, identify the safety distance of two face synchronous mining and take corresponding prevention measures, in order to achieve the purpose of safety production.The research achievement of this paper has a practical guiding significance for the No.2JiNing coalmine in the later mining, and provides the mine safety production with a certain technical support, and lays a certain foundation for preventing and controlling the rock burst.